The 2013 NFL season is already into Week 6, and certain fantasy football dilemmas should define the latest in the perpetual deliberation fantasy owners endure on a constant basis.

Three scenarios stand out in particular with regard to players who seem to be on the cusp of stardom, but are either facing difficult matchups or are not yet proven enough to trust.

In this edition of start 'em, sit 'em, we will focus on situations in which the players are worth the risk thanks to their upside and need for their real teams to rely on them in the game plan.

These aren't necessarily options to count on in the long-term, but for this week, they're risky but rewarding starters.

Can Terrelle Pryor Perform vs. Tough Chiefs Defense?

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The former top-flight high school recruit out of Jeannette, Pa., did not quite fulfill his potential at Ohio State and was quiet for much of his first two years in the NFL.

Pryor apparently never knew how to throw a football until working with quarterback guru Tom House on his throwing motion this offseason.

The strides have been evident this season, and Pryor had his best game yet as a passer in completing 18-of-23 passes for 221 yards and two touchdowns in a critical AFC West win over the San Diego Chargers.

Universal praise showered Pryor—and rightfully so:

Week 6 presents a difficult challenge, though, because the Raiders travel to Arrowhead Stadium to take on the undefeated Chiefs and are 10-point underdogs, according to Topbet.

Kansas City leads the league with 21 sacks, but are 21st against the run. The unit has proved capable of containing a dynamic QB such as the Philadelphia Eagles' Michael Vick, but that was partly due to the uptempo offense the Eagles deploy flaming out too fast.

Pryor is more imposing than Vick at 6'4" and 233 pounds, and he's showing more innate accuracy as a passer now that his throwing motion is squared away.

Not only is Pryor going to continue proving past critics wrong—he will key the upset special of the weekend.

Jeffery had 218 yards on 10 receptions and a touchdown in the Chicago Bears' 26-18 loss in Week 5 against the New Orleans Saints, proving he's well on his way to being a premier receiver in his second season.

Even with a superstar like Brandon Marshall starting opposite him, there should be plenty of balls from QB Jay Cutler for Jeffery to get his numbers.

On Monday, Pro Football Focus pointed out just how efficient Jeffery was against a stout Saints defense:

It's no wonder that Marshall feels his teammate could be the best receiver of all time, per CSNChicago.com's Scott Krinch:

I've always said this guy could be the best to ever do it...He's probably going to shatter all the Bears' records by the time he's done at the receiver position. That's one of the only positives from our offense today.

New Orleans still has the 12th-ranked pass defense in the NFL after getting shredded mostly by the combination of Cutler and Jeffery, and the Bears face an even more favorable matchup this week.

The New York Giants come to Soldier Field on Thursday night, reeling on a 0-5 start to the season and with a defense that's generated just five sacks all season.

Giving Cutler that type of time in the pocket is dangerous, and it should produce a second consecutive monster performance from Jeffery.